Objective: The cerebellum takes part in several motor functions through its influence on the motor cortex (M1). Here, we applied the theta burst stimulation (TBS) protocol, a novel form of repetitive Transcranial Magnetic Stimulation (rTMS) over the lateral cerebellum. The aim of this study was to test whether TBS of the lateral cerebellum could be able to modulate the excitability of the contralateral M1 in healthy subjects. Methods: Motor-evoked potentials (MEPs) amplitude, short intracortical inhibition (SICI), long intracortical inhibition (LICI) and short intracortical facilitation (SICF) were tested in the M1 before and after cerebellar continuous TBS (cTBS) or intermittent TBS (iTBS). Results: We found that cTBS induced a reduction of SICI and an increase of LICI. On the other hand, cerebellar iTBS reduced LICI. MEPs amplitude also differently vary following cerebellar stimulation with cTBS or iTBS, resulting in a decrease by the former and an increase by the latter. Conclusions: Although the interpretation of these data remains highly speculative, these findings reveal that the cerebellar cortex undergoes bidirectional plastic changes that modulate different intracortical circuits within the contralateral primary motor cortex. Significance: Long-lasting modifications of these pathways could be useful to treat various pathological conditions characterized by an altered cortical excitability. © 2008 International Federation of Clinical Neurophysiology.

Koch, G., Mori, F., Marconi, B., Codecà, C., Pecchioli, C., Salerno, S., et al. (2008). Changes in intracortical circuits of the human motor cortex following theta burst stimulation of the lateral cerebellum. CLINICAL NEUROPHYSIOLOGY, 119(11), 2559-2569 [10.1016/j.clinph.2008.08.008].

Changes in intracortical circuits of the human motor cortex following theta burst stimulation of the lateral cerebellum

Torriero, Sara;LO GERFO, EMANUELE;
2008

Abstract

Objective: The cerebellum takes part in several motor functions through its influence on the motor cortex (M1). Here, we applied the theta burst stimulation (TBS) protocol, a novel form of repetitive Transcranial Magnetic Stimulation (rTMS) over the lateral cerebellum. The aim of this study was to test whether TBS of the lateral cerebellum could be able to modulate the excitability of the contralateral M1 in healthy subjects. Methods: Motor-evoked potentials (MEPs) amplitude, short intracortical inhibition (SICI), long intracortical inhibition (LICI) and short intracortical facilitation (SICF) were tested in the M1 before and after cerebellar continuous TBS (cTBS) or intermittent TBS (iTBS). Results: We found that cTBS induced a reduction of SICI and an increase of LICI. On the other hand, cerebellar iTBS reduced LICI. MEPs amplitude also differently vary following cerebellar stimulation with cTBS or iTBS, resulting in a decrease by the former and an increase by the latter. Conclusions: Although the interpretation of these data remains highly speculative, these findings reveal that the cerebellar cortex undergoes bidirectional plastic changes that modulate different intracortical circuits within the contralateral primary motor cortex. Significance: Long-lasting modifications of these pathways could be useful to treat various pathological conditions characterized by an altered cortical excitability. © 2008 International Federation of Clinical Neurophysiology.
Articolo in rivista - Articolo scientifico
Cerebellum; Connectivity; Intracortical inhibition; Theta burst stimulation; TMS; Transcranial magnetic stimulation; Adult; Analysis of Variance; Cerebellum; Differential Threshold; Electric Stimulation; Electromyography; Evoked Potentials, Motor; Female; Functional Laterality; Hand; Humans; Male; Motor Cortex; Neck Muscles; Neural Inhibition; Psychomotor Performance; Time Factors; Transcranial Magnetic Stimulation; Young Adult; Theta Rhythm; Neurology (clinical); Neurology; Physiology (medical); Sensory Systems
English
2008
119
11
2559
2569
none
Koch, G., Mori, F., Marconi, B., Codecà, C., Pecchioli, C., Salerno, S., et al. (2008). Changes in intracortical circuits of the human motor cortex following theta burst stimulation of the lateral cerebellum. CLINICAL NEUROPHYSIOLOGY, 119(11), 2559-2569 [10.1016/j.clinph.2008.08.008].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/66274
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